diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index 917e7b6264..7fbde60681 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -1541,7 +1541,7 @@ static int read_diff_float_data(ALSDecContext *ctx, unsigned int ra_frame) {
                 if (ctx->raw_samples[c][i] != 0) {
                     //The following logic is taken from Tabel 14.45 and 14.46 from the ISO spec
                     if (av_cmp_sf_ieee754(acf[c], FLOAT_1)) {
-                        nbits[i] = 23 - av_log2(abs(ctx->raw_samples[c][i]));
+                        nbits[i] = 23 - av_log2(FFABSU(ctx->raw_samples[c][i]));
                     } else {
                         nbits[i] = 23;
                     }